We are ready to visit the JSP page at: http://localhost:8080/hello_tag.jspx.
The output on the brower confirms that my custom tag is working!

Hello world! - From HelloTag

If you are changing your tag class after it has been loaded by tomcat,
you may need to restart Tomcat, or click "restart" on the "root" application
on the Tomcat admin page. "root" application is where I put my JSP pages.